Global e-health policy: a work in progress.

E-health (information and communication technology that facilitates health and health care) is expanding in developed, developing, and least-developed countries. E-health's ability to transcend sociopolitical boundaries holds the potential to create a borderless world for health systems and health care delivery. But the policy needed to guide e-health development is limited and just now emerging in developed countries. What's needed to foster e-health growth in the developing world is thoughtful policy to facilitate patient mobility and data exchange, across both international borders and regional boundaries within countries.